据说是：
 吃避孕药的抑制排卵，每次的period其实是fake period。
不是真正的排卵后，排出黄体。子宫内膜剥落，为下一次着床做准备。
没有排卵，卵巢就休息了。

估计也就是因为这个所以可以抑制囊肿。

I don't think the cyst is necessarily due to control pill. Our body is working all the time, who can predict what is going to happen in the future? As you see, it is common in female.

[此贴子已经被作者于2009-2-27 11:13:32编辑过]

For those who want to know more about ovarian cysts, you will find some information here
http://www.4woman.gov/faq/ovarian-cysts.cfm